[Coco] [Color Computer] keyboard problems

[jdaggett at gate.net]

On 7 Jan 2007 at 9:02, PaulH96636 at aol.com wrote:

> Would advise against using tap water as a final rinse; used
> demineralised or distilled water; rain water would be okay.  Main
> thing is that tap water likely  has dissolved salts which will remain
> on the board after water evaporates and can cause  shorts and
> corrosion of metal contacts. Again, hard water leaves deposits  which
> can also remain semi-wet in humid conditions;  these deposits can be 
> corrosive.

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Main issue is tap water has chlorine in it. Plus several other halogens like flourine. 
Hologens,  which chlorine is one, are very reactive with metals to form salt 
compounds on the PCB and is asking for dissaster over time. 

The best solution is to go to Walgreens and buy their 91% isopropol alchohol. 
Don't use 70%. Alcohol is one of the better cleaners of PCBs and contacts. 

james